/*******************************************************************************
 * Copyright 2011, 2012 Chris Banes.
 * <p/>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package com.handmark.pulltorefresh.library.internal;

import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.ColorStateList;
import android.content.res.TypedArray;
import android.graphics.Typeface;
import android.graphics.drawable.AnimationDrawable;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.text.TextUtils;
import android.util.Log;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Interpolator;
import android.view.animation.LinearInterpolator;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.TextView;

import com.handmark.pulltorefresh.library.ILoadingLayout;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Orientation;
import com.handmark.pulltorefresh.library.R;

@SuppressLint("ViewConstructor")
public abstract class LoadingLayout extends FrameLayout implements
        ILoadingLayout {
    static final String LOG_TAG = "PullToRefresh-LoadingLayout";

    static final Interpolator ANIMATION_INTERPOLATOR = new LinearInterpolator();

    private FrameLayout mInnerLayout;

    protected ImageView mHeaderImage;//他才是真正旋转的图片
    protected final ImageView mHeaderProgress;

    private boolean mUseIntrinsicAnimation;

    private final TextView mHeaderText;
    private final TextView mSubHeaderText;

    protected final Mode mMode;
    protected final Orientation mScrollDirection;

    private CharSequence mPullLabel;
    private CharSequence mRefreshingLabel;
    private CharSequence mReleaseLabel;

    TextView mTvLabel;//
    TextView mTvLoadText;// 自定义的加载显示文本

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public LoadingLayout(Context context, final Mode mode,
                         final Orientation scrollDirection, TypedArray attrs) {
        super(context);
        mMode = mode;
        mScrollDirection = scrollDirection;

        switch (scrollDirection) {
            case HORIZONTAL:
                LayoutInflater.from(context).inflate(
                        R.layout.pull_to_refresh_header_horizontal, this);
                break;
            case VERTICAL:
            default:
                LayoutInflater.from(context).inflate(
                        R.layout.pull_to_refresh_header_vertical, this);
                break;
        }

        // TODO
        mInnerLayout = (FrameLayout) findViewById(R.id.fl_inner);// 更改了最外层的布局了,这里也要改

        mHeaderText = (TextView) mInnerLayout
                .findViewById(R.id.pull_to_refresh_text);
        mHeaderProgress = (ImageView) mInnerLayout
                .findViewById(R.id.pull_to_refresh_progress);
        //启动旋转动画
//        mHeaderProgress.startAnimation(AnimationUtils.loadAnimation(getContext(), R.anim.custom_circle_progress_bar_refresh));

        mSubHeaderText = (TextView) mInnerLayout
                .findViewById(R.id.pull_to_refresh_sub_text);

        mHeaderImage = (ImageView) mInnerLayout
                .findViewById(R.id.pull_to_refresh_image);

        mTvLabel = (TextView) mInnerLayout.findViewById(R.id.tv_label);// lu9的标签
        mTvLoadText = (TextView) mInnerLayout
                .findViewById(R.id.pull_to_refresh_text_load);// 上拉加载的文字

        FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) mInnerLayout
                .getLayoutParams();

        switch (mode) {
            case PULL_FROM_END:
                lp.gravity = scrollDirection == Orientation.VERTICAL ? Gravity.TOP
                        : Gravity.LEFT;

                mPullLabel = context
                        .getString(R.string.pull_to_refresh_from_bottom_pull_label);
                mRefreshingLabel = context
                        .getString(R.string.pull_to_refresh_from_bottom_refreshing_label);
                mReleaseLabel = context
                        .getString(R.string.pull_to_refresh_from_bottom_release_label);

                break;
            case PULL_FROM_START:
            default:
                lp.gravity = scrollDirection == Orientation.VERTICAL ? Gravity.BOTTOM
                        : Gravity.RIGHT;

                mPullLabel = context.getString(R.string.pull_to_refresh_pull_label);
                mRefreshingLabel = context
                        .getString(R.string.pull_to_refresh_refreshing_label);
                mReleaseLabel = context
                        .getString(R.string.pull_to_refresh_release_label);

                break;
        }

        if (attrs.hasValue(R.styleable.PullToRefresh_ptrHeaderBackground)) {
            Drawable background = attrs
                    .getDrawable(R.styleable.PullToRefresh_ptrHeaderBackground);
            if (null != background) {
                ViewCompat.setBackground(this, background);
            }
        }

        if (attrs.hasValue(R.styleable.PullToRefresh_ptrHeaderTextAppearance)) {
            TypedValue styleID = new TypedValue();
            attrs.getValue(R.styleable.PullToRefresh_ptrHeaderTextAppearance,
                    styleID);
            setTextAppearance(styleID.data);
        }
        if (attrs
                .hasValue(R.styleable.PullToRefresh_ptrSubHeaderTextAppearance)) {
            TypedValue styleID = new TypedValue();
            attrs.getValue(
                    R.styleable.PullToRefresh_ptrSubHeaderTextAppearance,
                    styleID);
            setSubTextAppearance(styleID.data);
        }

        // Text Color attrs need to be set after TextAppearance attrs
        if (attrs.hasValue(R.styleable.PullToRefresh_ptrHeaderTextColor)) {
            ColorStateList colors = attrs
                    .getColorStateList(R.styleable.PullToRefresh_ptrHeaderTextColor);
            if (null != colors) {
                setTextColor(colors);
            }
        }
        if (attrs.hasValue(R.styleable.PullToRefresh_ptrHeaderSubTextColor)) {
            ColorStateList colors = attrs
                    .getColorStateList(R.styleable.PullToRefresh_ptrHeaderSubTextColor);
            if (null != colors) {
                setSubTextColor(colors);
            }
        }

        // Try and get defined drawable from Attrs
        Drawable imageDrawable = null;
        if (attrs.hasValue(R.styleable.PullToRefresh_ptrDrawable)) {
            imageDrawable = attrs
                    .getDrawable(R.styleable.PullToRefresh_ptrDrawable);
        }

        // Check Specific Drawable from Attrs, these overrite the generic
        // drawable attr above
        switch (mode) {
            case PULL_FROM_START:
            default:
                if (attrs.hasValue(R.styleable.PullToRefresh_ptrDrawableStart)) {
                    imageDrawable = attrs
                            .getDrawable(R.styleable.PullToRefresh_ptrDrawableStart);
                } else if (attrs.hasValue(R.styleable.PullToRefresh_ptrDrawableTop)) {
                    Utils.warnDeprecation("ptrDrawableTop", "ptrDrawableStart");
                    imageDrawable = attrs
                            .getDrawable(R.styleable.PullToRefresh_ptrDrawableTop);
                }
                break;

            case PULL_FROM_END:
                if (attrs.hasValue(R.styleable.PullToRefresh_ptrDrawableEnd)) {
                    imageDrawable = attrs
                            .getDrawable(R.styleable.PullToRefresh_ptrDrawableEnd);
                } else if (attrs
                        .hasValue(R.styleable.PullToRefresh_ptrDrawableBottom)) {
                    Utils.warnDeprecation("ptrDrawableBottom", "ptrDrawableEnd");
                    imageDrawable = attrs
                            .getDrawable(R.styleable.PullToRefresh_ptrDrawableBottom);
                }
                break;
        }

        // If we don't have a user defined drawable, load the default
        /** 下拉刷新和价格布局更改* */
        if (null == imageDrawable) {
            switch (mode) {
                case PULL_FROM_START:
                    imageDrawable = context.getResources().getDrawable(
                            R.drawable.default_ptr_rotate);
                    mTvLabel.setVisibility(View.VISIBLE);
                    mSubHeaderText.setVisibility(View.VISIBLE);// 不显示下拉加载的文本
                    mTvLoadText.setVisibility(View.GONE);// 加载更多的布局
                    mHeaderText.setVisibility(View.VISIBLE);
                    break;
                case PULL_FROM_END:
                    imageDrawable = context.getResources().getDrawable(
                            R.drawable.loading_more);
                    mTvLabel.setVisibility(View.GONE);
                    mSubHeaderText.setVisibility(View.GONE);// 不显示下拉加载的文本
                    mTvLoadText.setVisibility(View.VISIBLE);// 显示加载更多的样式
                    mHeaderText.setVisibility(View.GONE);
                    break;
            }
        }
        // Set Drawable, and save width/height
        setLoadingDrawable(imageDrawable);
        reset();
    }

    public final void setHeight(int height) {
        ViewGroup.LayoutParams lp = (ViewGroup.LayoutParams) getLayoutParams();
        lp.height = height;
        requestLayout();
    }

    public final void setWidth(int width) {
        ViewGroup.LayoutParams lp = (ViewGroup.LayoutParams) getLayoutParams();
        lp.width = width;
        requestLayout();
    }

    public final int getContentSize() {
        switch (mScrollDirection) {
            case HORIZONTAL:
                return mInnerLayout.getWidth();
            case VERTICAL:
            default:
                return mInnerLayout.getHeight();
        }
    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public final void hideAllViews() {
        if (View.VISIBLE == mHeaderText.getVisibility()) {
            mHeaderText.setVisibility(View.INVISIBLE);
        }
        if (View.VISIBLE == mHeaderProgress.getVisibility()) {
            mHeaderProgress.setVisibility(View.GONE);
            mHeaderProgress.setLayerType(View.LAYER_TYPE_NONE, null);//单个View禁用硬件加速
        }
        if (View.VISIBLE == mHeaderImage.getVisibility()) {
            mHeaderImage.setVisibility(View.GONE);
        }
        if (View.VISIBLE == mSubHeaderText.getVisibility()) {
            mSubHeaderText.setVisibility(View.INVISIBLE);
        }
    }

    public final void onPull(float scaleOfLayout) {
        if (!mUseIntrinsicAnimation) {
            onPullImpl(scaleOfLayout);
        }
    }

    public final void pullToRefresh() {
        if (null != mHeaderText) {
            mHeaderText.setText(mPullLabel);
            mTvLoadText.setText(mPullLabel);
        }

        // Now call the callback
        pullToRefreshImpl();
    }

    public final void refreshing() {
        if (null != mHeaderText) {
            mHeaderText.setText(mRefreshingLabel);
            mTvLoadText.setText(mRefreshingLabel);
        }

        if (mUseIntrinsicAnimation) {
            ((AnimationDrawable) mHeaderImage.getDrawable()).start();
        } else {
            // Now call the callback
            refreshingImpl();
        }

        if (null != mSubHeaderText) {
            mSubHeaderText.setVisibility(View.GONE);
        }
    }

    public final void releaseToRefresh() {
        if (null != mHeaderText) {
            mHeaderText.setText(mReleaseLabel);
            mTvLoadText.setText(mReleaseLabel);
        }

        // Now call the callback
        releaseToRefreshImpl();
    }

    public final void reset() {
        if (null != mHeaderText) {
            mHeaderText.setText(mPullLabel);
            mTvLoadText.setText(mPullLabel);
        }
        mHeaderImage.setVisibility(View.VISIBLE);

        if (mUseIntrinsicAnimation) {
            ((AnimationDrawable) mHeaderImage.getDrawable()).stop();
        } else {
            // Now call the callback
            resetImpl();
        }

        if (null != mSubHeaderText) {
            if (TextUtils.isEmpty(mSubHeaderText.getText())) {
                mSubHeaderText.setVisibility(View.GONE);
            } else {
                mSubHeaderText.setVisibility(View.VISIBLE);
            }
        }
    }

    @Override
    public void setLastUpdatedLabel(CharSequence label) {
        setSubHeaderText(label);
    }

    public final void setLoadingDrawable(Drawable imageDrawable) {
        // Set Drawable
        // TODO 设置加载图片的样式

        mHeaderImage.setImageDrawable(imageDrawable);
        mUseIntrinsicAnimation = (imageDrawable instanceof AnimationDrawable);

        // Now call the callback
        onLoadingDrawableSet(imageDrawable);
    }

    public void setPullLabel(CharSequence pullLabel) {
        mPullLabel = pullLabel;
    }

    public void setRefreshingLabel(CharSequence refreshingLabel) {
        mRefreshingLabel = refreshingLabel;
    }

    public void setReleaseLabel(CharSequence releaseLabel) {
        mReleaseLabel = releaseLabel;
    }

    @Override
    public void setTextTypeface(Typeface tf) {
        mHeaderText.setTypeface(tf);
    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public final void showInvisibleViews() {
        if (View.INVISIBLE == mHeaderText.getVisibility()) {
            mHeaderText.setVisibility(View.VISIBLE);
        }
        if (View.GONE == mHeaderProgress.getVisibility()) {
            mHeaderProgress.setVisibility(View.VISIBLE);
            mHeaderProgress.setLayerType(View.LAYER_TYPE_HARDWARE, null);//单个View禁用硬件加速
        }
        if (View.GONE == mHeaderImage.getVisibility()) {
            mHeaderImage.setVisibility(View.VISIBLE);
        }
        if (View.INVISIBLE == mSubHeaderText.getVisibility()) {
            mSubHeaderText.setVisibility(View.VISIBLE);
        }
    }

    /**
     * Callbacks for derivative Layouts
     */

    protected abstract int getDefaultDrawableResId();

    protected abstract void onLoadingDrawableSet(Drawable imageDrawable);

    protected abstract void onPullImpl(float scaleOfLayout);

    protected abstract void pullToRefreshImpl();

    protected abstract void refreshingImpl();

    protected abstract void releaseToRefreshImpl();

    protected abstract void resetImpl();

    private void setSubHeaderText(CharSequence label) {
        if (null != mSubHeaderText) {
            if (TextUtils.isEmpty(label)) {
                mSubHeaderText.setVisibility(View.GONE);
            } else {
                mSubHeaderText.setText(label);

                // Only set it to Visible if we're GONE, otherwise VISIBLE will
                // be set soon
                if (View.GONE == mSubHeaderText.getVisibility()) {
                    mSubHeaderText.setVisibility(View.VISIBLE);
                }
            }
        }
    }

    private void setSubTextAppearance(int value) {
        if (null != mSubHeaderText) {
            mSubHeaderText.setTextAppearance(getContext(), value);
        }
    }

    private void setSubTextColor(ColorStateList color) {
        if (null != mSubHeaderText) {
            mSubHeaderText.setTextColor(color);
        }
    }

    private void setTextAppearance(int value) {
        if (null != mHeaderText) {
            mHeaderText.setTextAppearance(getContext(), value);
        }
        if (null != mSubHeaderText) {
            mSubHeaderText.setTextAppearance(getContext(), value);
        }
    }

    private void setTextColor(ColorStateList color) {
        if (null != mHeaderText) {
            mHeaderText.setTextColor(color);
        }
        if (null != mSubHeaderText) {
            mSubHeaderText.setTextColor(color);
        }
    }

    /**
     * 获取logo的TextView
     *
     * @return
     */
    public View getLogoTextView() {
        return mTvLabel;
    }


}
